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P. A. OOUPAL. SEWING MACHINE.

Pate nted Mar. 30, 1897.

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No. 579,922. Patented Mar. 30, 1897.

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P. A. GOUPAL. SEWING MACHINE.

No. 579,922. Patented Mar. 30, 1897.

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SEWING MACHINE.

No. 579,922. v Patented Mar. 30, 1897..

worm mm WASHINGTON o c UNITED STATES PATENT Ormcn.

PETER A. COUPAL, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO 'WILLIAM GORDON, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 579,922, dated March 30, 1897. Application filed May 21, 1896- Serial No. 592,432. (No model.)

To all whom it may concern:

Be it known that I, PETER A. OOUPAL, of Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Sewing-Machines, of

which the following is a specification.

This invention relates to sewing-machines, and has particular reference to that type of machine which employs a curved needle and is adapted for sewing welted boots and shoes; and the object of the invention is to provide an improved simple and durable construe tion of machine for this purpose; and it has for its particular object to provide means for I 5 basting a lasted upper to the inner sole of a welted boot or shoe while the upper is secured thereto by lasting-tacks, and at the same time pulling out the lasting-tacks close to the point where the basting-stitches are formed, the upper and welt being thus secured together by fastenings which will not interfere with the operation of a Welt-sewing machine in stitching together the welt, upper, and inner sole, so that the permanent stitch-forming operation may be performed immediately after the lasting operation without the necessity of waiting until the upper has become sufficiently set in its lasted form to warrant the removal of the lasting-tacks.

0 It is the usual practice after lasting a boot or shoe upper and securing it with lastingtacks to lay aside the upper while on the last and allow it to remain for a considerable period, usually twenty four hours, until the 3 5 form of the upper has become sufficiently permanent to warrant the removal of the lasting-tacks, so that the Welt, upper, and inner sole may be stitched together by a welt-sewing machine. By my invention the lastingtacks are removed progressively and the upper and inner sole are connected close to the point where each tack is removed by light bastin g-stitches designed to form a temporary connection between the two and to hold the 5 upper in its lasted form upon the last during the permanent stitch-forming operation.

In carrying out the invention I employ a combination of curved needle and rotary hook, and I also employ improved means for operating the stitch-forming mechanism and for imparting the proper movemen ts to a tackpuller arranged to draw tacks from the work at a point beside the work-rest and presserfoot and for operating a trimming blade adapted to remove the surplus material from the work.

To these ends the invention consists in the construction and combination of parts herein described and claimed.

Of the accompanying drawings, forminga part of this specification, Figure 1 represents a side elevation of a machine embodying the invention, the main driving-shaft being in section. Fig. 2 represents a front elevation of the same. Fig. 3 represents a top plan view. Fig. 4 represents a section on line 4 4 of Fig. 1, looking downward. Fig. 5 represents an elevation from the side opposite to that shown in Fig. 1, parts being shown in section. Fig. 6 represents a section 011 line 6 6 of Fig. 1.

Similar letters of reference indicate the same parts throughout the several views.

In the drawings, (t represents the frame of the machine, mounted upon a suitable base or standard and having bearings for the main shaft 6, provided with adriving-pulleyb and upon which is secured the spiral gear b (see Fig. 6,) meshing with a spiral gear 0 on the shaft 0 of the rotary hook c, said shaft 0 bein g mounted in suitable bearings in the frame of the machine at a right angle to the shaft 1?.

cl represents a work support or guide which is formed to support the lip that is turned out from the sole for the purpose of being stitched to the upper in sewing a welted boot or shoe, and 2 represents the curved needle carried by the arm 6, pivoted to the frame at e and oscillated by the lever 6 through the medium of a link 6 This bell-crank lever e is pivoted at e and has its rear end pivotally connected with the pitman e of an cecentric-strap e fitted to the eccentric e on the main shaft 6.

An arm f, projecting from the lever 6 carries a wheel f at its upper end, which wheel engages the sewing-thread g and acts to take up the same in a manner common to this type of machine, the take-up wheel acting to draw the thread down at the proper time between the guide-wheels f f which are mounted on the frame of the machine. A suitable tension device is indicated at f.

A presser-foot 7i is carried at the lower end of a rod it, fitted to slide vertically in suitable openings in the frame and pressed downward by a spring 72, acting on a block 7i, secured to the rod. The upper end of the red It is received in the bifurcated front end of a lever 7i", pivoted at 7r 011 the top of the frame and having its rear end bifurcated to receive the upper end of a rod 7t, which extends down through the frame of the machine and is adapted to be operated by a suitable foot-lever, (not shown,) so as to elevate the presser-foot against the power of its spring 1L2 when desired, the upper ends of the rods 7L and 71. being provided with suitable nuts which engage the upper surfaces of the bifurcated ends of the lever, and by means of which the proper relative adjustment of the rods and lover may be obtained.

Secured to the rod 71 is a block 7L7, which is adapted to engage a portion of the lever i of the feed mechanism hereinafter described, so that when the presser-foot is raised from the work by the operator for the purpose of removing it or for any other reason the feeddog will be also raised in case it at the time is on the work.

The four-motion feed-dog i is operated by the following described mechanism, the means for giving it its lateral movements be ing first mentioned. A lever i, (see Fig. 5,) pivoted at 71 is provided with a roll 1, entering a cam-groove I), formed in the side of the disk U, fast on the main shaft. This lever '11 is connected with a horizontal lever '11, piv oted at to the base of the frame, (see Figs. 4 and (5,) the connection being made by means of a pin i in the lower end of the lever 0'', said pin entering a cylindrical plug 11 which is fitted to a recess in the lever 23, this connection being one which permits the ready transmission of motion unaffected by the curved paths of movement of the two lovers in different planes. The other end of the lever i" is connected by means of alinki with an arm 1'", projecting from an oscillating standard 11 said standard being mounted on a stud i rising from the base of the frame and having a bracket or arm i at its upper end, (see Fig. 5,) to which is pivoted a lever 1', having the feeddog I secured to its outer end.

It will be readily understood from this description that the feed-dog is moved to advance the work by the mechanism just referred to. In order to adjust the length of feed, the rear end of the link i is provided with a pin entering a slot in the lever i, (indicated by dotted lines in Fig. 4,) and the top of the link is provided with a spring-latch 1', having a pin adapted to be fitted in one of a series of holes in a plate i that is attached to the lever '17, the end of the link proper being extended between the top of the lever i and the underside of the plate 2 as indicated in Figs. 2 and 6. 3y adjusting the connection between the lcvert" and link it toward or from the pivot of the former the length of feed movement of the dog 1' will be adjusted.

The vertical movements of: the feed-dog are obtained by the oscillation of the lever i pivoted in the arm Not the oscillating standard, the latter being hollow and containing a plunger 1. which is pressed upward by means of a spring I, a thrust-pin 11" being inserted between the plunger and the rear end of the lever t. Downward movement of the rear end of the lever P is imparted by means of an arm 1?, (see Fig. 5,) pivoted to the frame at 11 and provided with a lug i 011 one side thereof. livoted to the elbow-leverc is a plunger 7?, provided with a pin at its end, which is litted to a holein said lug Therefore as the lever c oscillates the contact of the lower end of the plunger 2' with the lug of the arm 1' causes the latter to be depressed, thus forcing down the rear end of the lever 6" against the tension of the spring i" and elevating the feed-dog The pressure of the feed-dog on the work is therefore a yielding one, due to the pressure of the spring i Of course it will be understood that the timing of the operation of the parts is such that the lateral or feed movement of the dog is imparted from the cam-groove 71 at a time when the plunger 1' is out of contact with the lug W, the latter contact occurring after the end of the ad vaneing movement of the feed-dog and holding the feed-dog elevated while it is retracted by means of the said cam-groove.

One side of the work-sup wrt (Z is provided with an edge cl, with which there is arranged to cooperate a cutter In, which is secured on the arm e of the needle. (See Fig. 1.)

In the use of the machine the work on its last is held against the outer side of the worksupport in a manner as usual with this class of machines, and the edges of the upper and inner sole rest on the top of said work-support and extend overthe edge d of the latter. The surplus material of the upper and inner sole is trimmed off by the cooperation with. the edge (1 of the cutter 7t, and owing to the latter being located on the oscillating arm c it may be and is in a position just inside of the path of the needle. This permits of the location of the tack-puller, presently described, close to the point of operation of the needle and trimmer, and thus the operations of stitching, trimming, and tack-pullin g all take place close together and adjacent to the presser-foot and Work-support, thereby insuring accuracy in results.

I will now proceed to describe the mechanism for imparting afour-motion movement to the tack-puller, the latter being indicated at 0. This tack-puller is secured to the lower end of a plunger 0, fitted to reciprocate in a guide or cylinder 0 the latter being pivoted at o to the head or frame of the machine. A stud 0 projects from the lower end of the guide 0 and is connected by means of alink ICC o with the upper end of the lever t", hereinbefore described, the movements of said lever 7 therefore imparting the lateral or tackpulling movements of the claw 0. The vertical movements of the claw or tack-puller are obtained by means of a lever 0", pivoted at 0 and having a roll in the cam-groove b of the disk 6 The forward end of this lever 0 is provided with a substantially horizontal groove 0 which receives a block 0 the said blockre'ceiving a pin 0 projecting from the plunger 0 through a slot 0 (see Fig. 5) in the guide 0 The timing of, the operation of the feeddog is such that while the needle descends the tack-puller also descends and then moves laterally to withdraw the tack. At the same time the cutter operates to remove the sur plus material, and the feed-dog rises and is retracted and moves down against the work as the needle rises. The latter having left the work, the feed-dog advances, and at the same time the tack-puller is raised and retracted, ready to be again moved downward simultaneously with the needle.

Having described the operation of the different parts of the mechanism, in connection with the description of their construction, further description is unnecessary.

I elain1 1. Asewing-machine comprising in its construction a curved needle and an oscillating arm therefor, a rotary hook or looper, a worksupport, and a cutter carried by the oscillating needle-arm.

2. A sewing-machine comprising in its construction a curved needle and an oscillating arm therefor, a rotary hook or looper, aworksupport, a cutter carried by the oscillating needle-arm, and a tack-puller arranged to draw tacks from the work at a point beside the work-rest.

3. In a sewing-machine, the combination with the curved needle and the oscillating arm therefor, of the lever e and link 6 and means for oscillating the lever, a feed-dog, an arm for raising the latter, and connections between the said lever and arm for operating the latter by the former.

at. In a sewing-machine, the combination with the curved needle and the oscillating arm therefor, of the lever e and link 6 and means for oscillating the lever, a feed-dog, the arm for raising the latter and provided with a lug and the plunger 2' carried by the lever and adapted to act on the lug 1' to raise the, feed-dog.

5. In a sewing-machine, the combination with stitch-forming mechanism, of a presserfoot and a lever for raising the latter, a rod provided with the block 71 and adapted to operate the lever, a feed-dog, and connect-ions adapted to be operated by the movement of the rod and its block in one direction to raise the feed-dog simultaneously with the presserfoot.

6. In a sewing-machine, the combination with stitch-forming mechanism, of a presserfoot and a lever for raising the latter, a rod adapted to operate the lever and provided with a block 71 the feed-dog and mechanism including the arm 2' for raising the latter, and springs adapted to depress the presser-foot and raise the arm r1 the said block 77, being arranged to engage the arm 1? to depress it.

7. In a sewing-machine, the combination with stitch-forming mechanism, of the lever 2" having the pin 2', the lever t carrying the plug 2' which receives the pin 2', and a feeddog connected with the said lever 2 8. In a sewing-machin'e, the combination with stitch-forming mechanism, of the lever t" having the pin 6", the lever i carrying the plugfiwhich receives the pin i and the oscillatin g standard 1' carrying the feed-dog and having an arm i adjustably connected with the lever 11 by means of the link i 9. In a sewing-machine, the combination with stitch-forming mechanism, of the lever t" having the pin i the lever t carrying the plug 2' which receives the pin 2', and the oscillat-in g standard 2' carrying the feed-dog and having an arm d adjnstably connected with the lever t by means of the link i one end of the lever 1' having the plate 2' provided with a series of holes and the link i having a movable pin adapted to engage either of said holes.

10. In a sewing-machine, the combination with stitch-forming mechanism, of the oscillating standard 1' having the spring-supported plunger 1' and means for oscillating the standard, the lever carrying the feeddog and pivoted to an arm of the standard and having its rear end acted upon by the said plunger, and the arm 7? adapted to move the lever 2' in opposition to the pressure of the plunger-spring.

11. In a sewing-machine, the combination with the work-support d having a shoulder, of the oscillating needle-arm or lever e having the cutter 7a rigidly secured thereto and adapted to cooperate with the work-support shoulder in trimming the work.

12. In a sewing-machine, the combination with stitch-forming mechanism, of the guide 0 having ways and means for oscillating it, the plunger 0 carrying the tack-puller 0 and adapted to slide in said ways, and the lever 0 adapted to reciprocate said plunger.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 15th day of May, A. D. 1896.

PETER A. COUPAL. Vitnesses:

HORACE BROWN, A. D. HARRISON. 

